x = (7y/4) / (3/1) = 7y/3
If 1 divided by 3x is equal to 4 divided by 7y, then we can cross-multiply and set the two expressions equal to each other:
1 = 4(3x) / 7y
To solve for x in terms of y, we can then multiply both sides of the equation by 7y and divide by 4:
7y = 4(3x)
y = 3x / 4
Therefore, x is expressed in terms of y as 3x/4. This is because we have used the property of equation, which is cross multiplying and dividing by a common factor to get the variable we want to express in terms of the other variable.